hi all, just wondered which is the best and most reliable themometer, i have two standard glass ones and a digital one, but the readings are about two degrees out, the glass ones at either end of the tank are exactly the same reading but the digi one is reading two degrees higher, both heaters are set the same but even they are set higher than what any of the themometers read, i know sometimes you set heaters slightly higher because of poistion and circulation etc, but wondered which themometer was more acurate, thanks again guys, see ya soon....